View Full Version : Check engine light came on

Jcs Lawn and Landscape
01-17-2006, 03:37 PM
as i was driving my 1999 dodge ram 1500 in 4x4 since some streets were horrible and others are dry my check engine light came on i have no idea what caused this because the motor sounds fine and it still runs and drives good any ideas why it came on and is not going away

01-17-2006, 03:50 PM
I know on my Ford's that if the gas cap isn't on all the way or on just right, the check engine light comes on. 99% of the time that's all that's wrong. If it's the same on Dodge give it some time to reset and the engine light will go away after a few starts. Also, you could get a code reader from Pep-Boys or AutoZone for about $80 that will read the codes when the light is on (only when the light is on). It pays for itself since mechanics charge $50+ just to hook it up.

01-17-2006, 04:03 PM
I got a dodge dakota and my check engine light has come on before. Sometimes it can be a sensor or like greg said the gas cap.
As I recall autozone or advance auto parts will hook their diagnostic code reader to your truck for free!!!!!!
How many miles you have on your RAM?

Jcs Lawn and Landscape
01-17-2006, 04:35 PM
thanks for the reply guys i checked the gas cap and it wasnt it. i got 90,000 miles on the ram and still hauls. i guess im gunna take it to autozone do you think it anything real serious though cause it does run as good as normal but who knows

01-17-2006, 05:39 PM
Takes about 2 seconds at autozone to grab the code. Might be an O2 sensor or the like. Have you checked all your fluid levels?

Dixie Rob
01-17-2006, 08:12 PM
I have a fleet of fords, and all them have the same computer so I just bought one. Most of the time it's an O2 sensor like nt1 said, or a EGR controller malfunctioning. However, last week I ran accross a code in one of our salesmen's ranger that said something to the point of Routine Maintenance Light, and that was signaling the check engine light. I just cleared it, and it is gone.

The Advance Auto Parts down the road from me will let you use their code readers for free.

01-17-2006, 08:28 PM
Just remember.. their job is to SELL auto parts.. not FIX auto problems.. Never ask a barber if you need a hair cut!

Dirty Water
01-17-2006, 08:43 PM
My money is on a dirty EGR sensor. A codescanner will tell you right off if it is.

A lot of times you can clean the carbon off them and reassemble without having to replace it.

01-17-2006, 09:05 PM
There are hundreds of problems that can cause an engine light. Until you read the code anything you do is just a WAG.

01-17-2006, 09:19 PM
You could always unhooked the batteries for about 20 mins. It should erase the code. Then see if it comes back or was just a fluke.

01-18-2006, 12:28 AM
You could always unhooked the batteries for about 20 mins. It should erase the code. Then see if it comes back or was just a fluke.
wont always work depends what code is some stay logged in computer till cleared. my engine light has come on twice both times it was the overdrive solenoid missed a shift. that is one that stays logged till cleared i tried to unhook battery came right back hooked up scanner cleared it and it was gone